The scenes where Milo Jackson (Tim Conway) is shrunk to miniature size were extremely expensive to shoot during the time the film was made due to then big cost of constructing such very enormous props. The gigantic telephone itself cost US $7,900 to make whilst the woman's handbag and its chattels totaled to US $15,000.
Actor Jan-Michael Vincent did his own swimming in the movie but all the sporty stunts and athletic feats were performed by body doubles and stunt men.
Scenes featuring the African country of Zambia were not shot there but in fact were filmed at the then 487 acre "Lion County Safari Park" south of Disneyland in Southern California owned by Ralph Helfer. The jungle sequences were shot at the Caswell Memorial State Park near Ripon, California.
The Great Wall of China shot was actually a matte painting painted by Alan Maley superimposed over footage of Newhall, California.
John Amos replaced Godfrey Cambridge as Coach Sam Archer. Cambridge collapsed just after the start of filming and had to withdraw from the picture.
Pete Carroll: The USC head football coach appears uncredited. Carroll is the running back that had the interception for a hundred-yard touchdown. Carroll played as a defensive back at University of the Pacific.